Respirator.



s. w. GREENE.

RESPIRATOR.

APPLICATION FILED sEPT.20. 1910.

1,192,186. Patented July 25,1916;

WITNESSES INVENTUFR.

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ATTB RNEY.

UN 1T STATE S L AT ENT F fill,

RESPIRATOR.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed September 20, 1910. Serial No. 582,844.

1 '0 all whom it may concern- Be it known that I, SAMUEL VVARQ GREENE,of East Greenwich, in the county of Kent and State of Rhode Island, haveinvented certain new and useful Improvements in Respirators; and I dohereby declare the following specification, taken in connection with theaccompanying drawings, forming a part of the same, to be a full, clear,and exact description thereof.

The invention relates to improvements in respirators, and has for itsprincipal object to provide an improved and novel construction ofrespirator especially designed for use in the dangerous dusty tradesinwhich a continuous current of fresh air is supplied to the nostrils ofthe user and the exhaled breath or vitiated air is expelled in such amanner as not to pollute the fresh air current flowing to the nostrils.

A further object of the invention is to provide a device of thischaracter which is supported upon the head and will not interfere withor affect the sight of the user.

A further object of the invention is to provide a delivery nozzle havingmeans for expanding the air current and causing it to flow against theupper lip directly beneath the nostrils and substantially at rightangles thereto.

A. further object of the invention is to provide said air deliverynozzle with means adjacent the nostrils for the escape of the aircurrent.

To these ends the invention consists of the novel form of respiratorhereinafter described and claimed, reference being had to theaccompanying drawings, in which Figure 1 is a side view of my improvedrespiratorin position on the head of the user. Fig. 2 is a top planview. Fig. 3 is a vertical sectional view of the delivery nozzle.

In the drawings 1 represents the air-tube or conduit through which thefresh air is supplied to the delivery nozzle 2. The major portion of theair-tube 1 is preferably flexible and it is provided with a rigid endportion 1 which is adjustably secured to a spring head clamp 3.

Secured upon one side of the head clamp 3 is a screw-threaded post 1which engages a slot 5 in the supporting member 6. The post 4 isprovided with a thumb nut 7 for clamping the supporting member inposition upon the head clamp 3. Said support ing member 6 is providedwith a lateral extension 8 having a turned over end portion 9 in whichis mounted an adjusting thumbscrew 10 which engages said lateralextension 8. The end portion 1 is secured to the bent over end portion 9and is constructed and arranged to extend down the side of the face ofthe user, but not in contact therewith, to a point substantially in linewith the lower end of the nose, and is then bent around the face so asto bring the delivery nozzle 2, which is secured to the free end of saidend portion, in close proximity to the nostrils, as shown in Figs. 1 and2.

The delivery nozzle 2 consists of a rectangular casing having the top11, bottom 12, outer side 13, and end portions 14 and 15. The under sideof the delivery nozzlenext to the face is open. The top 11 is providedwith a recess 16 to receive the end of the nose, and the inner edge 12of the bottom 12 is curved to conform with the curvature of the upperlip against which it is arranged to rest. The bottom 12 is provided withtwo inlet openings 17 and 18, one adjacent each end thereof and with arecess 19 on the inner edge 12 which serves as the outlet for the aircurrent.

Formed or secured upon the under side of the bottom 12 between the inletopenings 17 and 18 is a longitudinally extending L- shaped extension 20of the same width as the inner diameter of the end portion 1' of theair-tube 1. The tubular end portion 1 is provided with a closed end 21and the upper half of said end portion 1 is removed for a distance equalto the length of the delivery nozzle 2. Said delivery nozzle 2 is thensecured, preferably by solder, to the lower half of said end portion 1so that the extension 20 forms a central partition for the end portion1, as shown in Fig. 3.

Secured to the end portion 1 directly beneath the delivery nozzle 2 isan adjustablemouth shield 22 having arms 23 extending through openingsin posts 24 and arranged to be clamped in position by thumb-nuts 25.

The operation of the device is as follows: The air flows through theair-tube 1 under any desired pressure and into the end portion 1. Uponreaching the extension or partition 20 the air current is divided, aportion flowing upon the upper side of said partition up through theinlet opening 17 and a portion flowing upon the under side of saidpartition up through the inlet opening 18. As the current of air flowsup through the inlet openings 17 and 18 it strikes the top 11 and outerside 13 and is defiected toward the open inner side of the deliverynozzle 2 and against the upper lip of the user directly beneath thenostrils. In striking the upper lip the air current is furtherdeflected'toward the nostrils when the user is inhaling and toward theoutlet opening 19 when the user is eXhaling. With this construction itwill be seen that there is a continuous current of air through thedelivery nozzle flowing from the outer side to the face side, and thatwhen the user is exhaling, the .vitiated air is expelled from the nozzleadjacent the nostrils, so that when he begins to inhale, all of saidvitiated air will have been expelled from said nozzle and from thevicinity of the nostrils.

If desired additional outlet openings 26 may be formed in the ends 14and 15 of the delivery nozzle 2, as shown in Figs. 1 and 2.

It will be seen that with my novel means for securing the right endportion 1 to the head clamp 3 the delivery nozzle 2 can be adjusted inany desired direction to fit the user. By means of the slot 5 thedelivery nozzle can be raised or lowered; by turning the supportingmember around the post 4:

the delivery nozzle can be moved laterally toward or away from the face;and by .means of the adjusting thumb-screw 10 the delivery nozzle can bemoved longitudinally across the front of the face.

What I claim as my inventionand desire to secure by Letters Patent is:

1. A respirator comprising an air-tube having a rigid end portion.foi'medto extend.

down the side of the face and across to -the upper lip, a deliverynozzle secured to :the end of said rigid end portion, and .means uponthe head, means whereby the delivery nozzle maybe adjusted verticallyand laterally, and means for adjusting said deliv-,

ery nozzle longitudinally.

4. A respirator comprising an air-tube, a delivery nozzle secured to theend of said air-tube, a head clamp, a supporting member secured to theair-tube and mounted to slide and revolve upon a post secured to saidhead-clam) means for clam 3111 said sua- 7 I v I porting member inposition, and a lateral extension upon said supporting member provided.with' a turned over end portion carrying an adjusting thumb-screwarranged to engage said lateral extension.

,5. A respirator comprising a rigid airtube having a closed end and aportion of said tube cut away, adelivery nozzle secured to said air-tubeover said cut away portion, an extension upon the bottom of saiddelivery nozzle arranged to extend longitudinally within said air-tubeand form a central partition therein, an inlet opening in the bottom ofsaid delivery nozzle upon each side of said extension, and an air-outletupon the face side of said delivery nozzle.

SAMUEL \VARD GREENE. Vitnesses:

NV. H. THURSTON, J. H. TriURsroN.

Copies of this patent ma; be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

